Climate Overview
The climate in Ascencion is cool. The average annual temperature is 5°C and approximately 1590mm of precipitation falls per year. February is the wettest month, receiving around 250mm of rainfall. Ascencion is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: November, December, February. The coldest months are July, June, August, when temperatures can drop to -2°C. Snowfall occurs from January to December, with around 87cm accumulating over the season.
Temperature
Ascencion sees moderate temperature variation throughout the year, ranging from -2°C to 11°C. November is the warmest month, though highs remain moderate at 11°C with a mean of 6°C. The coldest month is July, when overnight lows fall to -2°C and the daily average is 3°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs.
Precipitation
Ascencion is a fairly wet location, receiving approximately 1590mm of precipitation annually, which averages out to around 132mm per month. The wettest month is February, averaging 250mm of rainfall. January and March also tend to see above-average precipitation. The driest month is July, with just 22mm. That's 228mm less than February, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 87cm accumulating over the season. February typically sees the most snow at around 14cm.
Wind
Ascencion is relatively calm, with an average annual wind speed of 11km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.
Seasons
89 days until Winter
It is currently autumn in Ascencion, which began on March 20, 2026. Ascencion is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in November at around 11°C, while the coldest stretch bottoms out in July near -2°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 0 to 11°C. Rainfall is heavy, totalling around 389mm across the season with a monthly average of 130mm. Winds are generally light, averaging 11km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 2 to 11°C. Rainfall is heavy, totalling around 691mm across the season with a monthly average of 230mm. Winds are generally light, averaging 11km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -1 to 11°C. Rainfall is heavy, totalling around 414mm across the season with a monthly average of 138mm. Expect around 18cm of snow accumulation during this period. Winds are generally light, averaging 10km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -2 to 10°C. Rainfall is relatively light, with around 96mm over the season and a monthly average of 32mm. Expect around 11cm of snow accumulation during this period. Winds are generally light, averaging 11km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Monthly Climate Data
The table below shows monthly climate averages for Ascencion based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
